package com.sell.controller;

import com.sell.enums.SellExceptionEnum;
import com.sell.exception.SellException;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.error.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.api.impl.WxMpServiceImpl;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;

/**
 * @author: lichujun
 * @date: 2018-08-21
 */
@Controller
@RequestMapping("/wechat")
@Slf4j
public class WechatController {

    @Autowired
    private WxMpService wxMpService;

    @GetMapping("/authorize")
    public String authorize(@RequestParam("returnURL") String resultUrl) throws UnsupportedEncodingException {
        //1.配置
        //2.调用
        String url = "http://***.com/sell/wechat/userInfo";
        String redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url,
                WxConsts.OAuth2Scope.SNSAPI_USERINFO,
                URLEncoder.encode(resultUrl, StandardCharsets.UTF_8.toString()));
        return "redirect:" + redirectUrl;
    }

    @GetMapping("/userInfo")
    public String userInfo(@RequestParam("code") String code,
                         @RequestParam("state") String returnUrl ) {
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken;
        try {
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        } catch (WxErrorException e) {
            log.error("【微信网页授权】{}", e);
            throw new SellException(SellExceptionEnum.WECHAT_MP_ERROR.getCode(), e.getError().getErrorMsg());
        }

        String openid = wxMpOAuth2AccessToken.getOpenId();
        return "redirect:" + returnUrl + "?openid" + openid;
    }
}
